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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics JOURNAL ONLINE OF PHYSICS Jurnal Terapan Abdimas Tunjuk Ajar: Jurnal Penelitian Ilmu Pendidikan JMM (Jurnal Masyarakat Mandiri) Journal of Physics and Its Applications JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI JUMANTIK: Jurnal Mahasiswa dan Peneliti Kesehatan Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Journal of Health and Nutrition Research Berita Kedokteran Masyarakat Jurnal Pengabdian Masyarakat Bhinneka SEHAT : JURNAL KESEHATAN TERPADU EXCELLENT HEALTH JOURNAL Science: Indonesian Journal of Science Evidence Midwifery Journal Jurnal Ilmiah Ilmu Kesehatan Journal of Experimental and Applied Physics
Syafriani Syafriani, Syafriani
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Earthquake Intensity Determination Based on Maximum Land Acceleration in Padang City Area Using Atkinson Boore Method (2003) Linda Susanti; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.40

Abstract

Geologically, the city of Padang had the potential for large earthquake impacts due to its location within the Sumatran Fault, Mentawai Fault, and above the Subduction Zone. The magnitude of earthquake damage was determined by soil quality factors and earthquake intensity. To determine the extent of damage, the maximum ground acceleration value was used. This value represented the maximum ground vibration acceleration that occurred at a specific location within a particular area, resulting from all earthquakes that occurred during a specific time period. The maximum ground acceleration value and earthquake intensity in the Padang City area could be calculated using the Atkhinson Boore (2003) method. This study was a quantitative research that commenced by examining relevant theories related to the issue at hand. The research then proceeded with the collection of secondary data obtained from the United States Geological Survey (USGS) website. Specifically, earthquake data for the period between 2000 - 2020 in the Padang City area with coordinates LS- LS and BT- BT, and a magnitude M ≥ 5.0 SR depth < 100 km were utilized. Historical earthquake data was employed to determine earthquake intensity values, which were then used to assess the earthquake risk in the Padang City area. Based on the calculation results, the maximum acceleration value of soil was found between 0.519001 g- 0.603847 g. The highest value of maximum acceleration of soil was located in Bungus Teluk Kabung area, while the lowest value was found in Koto Tangah area. The distribution of earthquake intensity (MMI) in Kota Padang area has a value of VIII MMI.
Seismotectonic Analysis and Seismic Potensial of The Sumatra Region Using The Guttenberg-Richter Method Yusrila, Yoga; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.46

Abstract

Sumatera is one of the most seismically active regions in Indonesia. This is due to the presence of subduction zones and active faults that influence the plate tectonic activity of the region, resulting in many earthquake events that cause damage and loss. One of the efforts to mitigate earthquake disasters is the analysis of seismotectonic parameters, which are indicated by the a-value and b-value of the Gutenberg-Richter equation in the earthquake frequency-magnitude relationship. Low seismotectonic parameters (a-value) and (b-value) can be interpreted as low seismic activity and high local rock stress conditions, and vice versa high (a-value) and (b- value). In this study, the analysis was performed spatially and temporally from the National Earthquake Information Center United States Geological Survey (NEISUSGS) earthquake catalogue. The data obtained in the form of longitude, latitude, depth, magnitude, time and location of the earthquake event, the data are limited to M ≥ 4.0Mw and Depth ≤ 350KM in the Sumatera region with the boundaries of 6030'LU-6°30'LS and 94BT-106°BT for the period 1990-2022. Based on the estimation results of the Guttenberg-Richter method in ZMAP v6 software, the b-value is 0.92-1.04 and the a-value is 7.42-7.97, with a return period of 6.5 Mw earthquakes generally ranging from 5-25 years.
Mapping the Peak Ground Acceleration Value and Seismic Intensity in Pesisir South District Area using The Empirical Formulation of SI and Midorikawa Fauzi, Muhammad Aulia; Syafriani, Syafriani
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.47

Abstract

The South Pesisir is an area that is prone to earthquakes, because it is in a zone that is traversed by the Sumatran fault, subduction zone and Mentawai fault. The 3 earthquake zones are areas that have an active level of seismicity from which the maximum ground acceleration value and earthquake intensity can be calculated. This research aims to determine and map the peak ground acceleration and seismic intensity values ​​to support development planning and spatial planning in the South Pesisir District area.This type of research is descriptive research, namely by collecting earthquake catalog data sourced from the USGS (United States Geological Survey) in the period 1973-2023 with coordinates -2.35°S – -1.04°N and 99.32°E – 101.27°E . The magnitude used is M ≥ 5 SR and a maximum depth of 300 Km. The method used in processing the peak ground acceleration data is the empirical formulation of Si and Midorikawa attenuation, then the peak ground acceleration and seismic intensity data output is displayed with ArcGis 10.8 software.The results obtained from calculating the higgest peak ground acceleration were in Lengayang District, Air Pura District, Pancung Soal District, and Basa IV Balai Tapan District with a value of 225.53 – 526.57 gal, while the lowest ground acceleration value was in Koto XI Tarusan District , Bayang District, North Bayang District, and Silaut District with a value of 16.15 – 27.91 gal. Meanwhile, the highest seismic intensity is in Lengayang District VIII MMI and the smallest seismic intensity is in Bayang District, North Bayang District, and Silaut District, namely IV MMI.
Microzonation of Seismic Vulnerability In Padang Panjang Timur Sub-District, Padang Panjang City Based on Microtremor Measurement Elizha, Zellvia; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.70

Abstract

Padang Panjang City is one of the cities in West Sumatra which has a high level of risk of the natural phenomenon of earthquakes. This is due to the fact that it is traversed by the active Sumatran fault which can cause earthquakes at any time. The purpose of this study was to determine the value of the seismic vulnerability index in Padang Panjang Timur District, Padang Panjang City using microtremor measurements. This type of research is descriptive research, namely research that describes the symptoms or phenomena studied. The location for data collection was Padang Panjang Timur District, Padang Panjang City, West Sumatra Province. There are 15 data collection points, and the distance between points is 500 m. The microtremor method of measuring this microtremor can determine the dominant frequency value (f0), amplification factor (A0), and susceptibility index value (Kg). Microtremor data processing was used to obtain the H/V curve at each point of data collection using Geopsy software. The results of the microzonation of the seismic susceptibility index (Kg) ranged from 1.05 × 10-6 s²/cm to 170.09 × 10-6 s²/cm. High seismic vulnerability index values ​​are found in the Koto Panjang Sub-District, Tanah Pak Lambik Sub-District, Guguk Malintang Sub-District, Ngalau Sub-District and Ganting Sub-District.
Evaluation of Pumice Source from Lubuk Basung Based on Magnetic Susceptibility Values Febriwanti, Mutiara Kusuma; Hamdi, Hamdi; Fauzi, Ahmad; Syafriani, Syafriani
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.80

Abstract

Lubuk Basung is one of the distribution areas of pyroclastic material from the Maninjau Caldera eruption that occurred 50,000 years ago and produced two different types of white pumice. The research purpose is to reveal whether the pumice samples taken from Lubuk Basung come from the same eruption or not based on susceptibility of magnetic scores. The susceptibility of magnetic scores can be measured by the Rock Magnetic Method using the Bartington Magnetic Susceptibility Meter Type B. From the magnetic susceptibility values obtained, normality test, homogeneity test, and mean similarity test of two different samples were conducted using IBM SPSS Statistics software. In the LBS 23-02 sample, a susceptibility of magnetic range of 41.9 x 10-8 m3/kg to 582.2 x 10-8 m3/kg was obtained, and the LBS 23-03 DB sample obtained a magnetic susceptibility value of 42.9 x 10-8 m3/kg to 535.5 x 10-8 m3/kg. From the normality, homogeneity, and mean similarity test, it is known that the LBS 23-02 and LBS 23-03 DB samples come from a population that is not distributed normally and not homogeneous, but an average comparison is obtained with a score of significance at 0.0426, which can be concluded that the two pumice samples found in Lubuk Basung come from the same eruption source, although each sample has different types and characteristics.
Determination of the structure and crystallite size of pumice magnetic minerals from Ngarai Sianok using X-Ray Diffraction (XRD) Azizah, Nur; Hamdi, Hamdi; Syafriani, Syafriani; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.86

Abstract

The structure and size of crystal are are important aspects of magnetic minerals pumice from Ngarai Sianok  to understand the geological processes of the area. Volcanic rocks in Ngarai Sianok contain magnetic minerals with unknown crystal structures. The crystal structure and size in pumice are analyzed using X-Ray Diffraction (XRD), where the type of magnetic mineral and crystal structure are determined by comparing the data measurement with the mineral database, while the crystal size can be determined using the Scherrer equation. Magnetic minerals in pumice from Ngarai Sianok are magnetite (Fe3O4) with a cubic mineral structure, ilmenite mineral (FeTiO3) with a hexagonal structure, and hematite mineral (Fe2O3) with a rhombohedral structure. The crystal size of magnetic minerals vary. The lowest is at an angle of 18.25 with a FWHM value of 0.1279 which results in a crystal size of 62.8995 nm. The highest crystal size is at an angle of 35.46 with a FWHM value of 0.0624, resulting in a crystal size of 133.6609 nm. FWHM value is inversely proportional to the size of the crystal, meaning that the size of the crystal formed is getting smaller with increasing FWHM. The average size of pumice crystals formed in Ngarai Sianok was calculated to be 102.6392 nm, the small crystal size indicates the rapid cooling of magma, usually occurring during explosive eruptions.
Analysis Of Normal Stress Distribution Of Earthquakes In The Fault Segment Of The West Sumatra Region Using The Stress Inversion Method: English Daya, Ellen Kurniawati; Syafriani, Syafriani; Hamdi , Hamdi; Amir, Harman
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.88

Abstract

West Sumatra was one of the regions on the island of Sumatra that had a high level of earthquake proneness. There were five segments of the Sumatran fault in this region. Normal stress distribution analysis could be carried out to determine tectonic activity in earthquake-prone areas. This research used the stress inversion method to identify normal stresses, which could trigger or inhibit fractures. The data used involved 17 fault plane parameters (strike, dip, rake) from earthquakes with a magnitude of ≥4.7 that occurred in the West Sumatra region from 1967-2023. The type of fault analysed was strike-slip, and the earthquake's epicenter was located on land. The results of this research provided an overview of the position and direction of normal stress due to earthquakes in the West Sumatra region. The distribution of the normal stress position of the fault segment was shown through the pressure and tension axes (P/T), with respectively sigma1, sigma2, and sigma3 having azimuth/plunge values of 353.990/4.760, 247.260/73.860, and 85.310/15.380. The direction of maximum normal stress (sigma1) is spreading in the northern part of the fault segment. In contrast, intermediate normal stress (sigma1) is situated in the western sector of the fault segment, while minimum normal stress (sigma3) is in the eastern part of the fault segment in this region. Analysis of the normal stress distribution is showing that the Talamau segment is being dominated by maximum normal stress, indicating that the Pasaman area and its surroundings are being considered vulnerable to faults and earthquakes.
ANALYSIS OF LANDSLIDE POTENTIAL IN GUNUNG OMEH SUB-DISTRICK LIMA PULUH KOTA REGENCY USING HVSR METHOD Nabilla, Agma; Syafriani, Syafriani
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.6, N
Publisher : Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v6i2.35996

Abstract

On BPBD Lima Puluh Kota designated Gunung Omeh Sub-district as a disaster-prone area due to the detected potential of moving soil. This mobile soil causes gaps in the soil with the potential to continue to move at any time and is exacerbated by unstable soil conditions that cause the risk of landslides. Therefore, there is a need for research in Gunung Omeh sub-district on landslide potential. This research aims to analyse the landslide potential in Gunung Omeh sub-district. Data collection is limited to 9 measurement points using a set of Sysmatrack MAE seismograph sensor type S3S. The data generated is in the form of seismic wave signals which are then processed with the HVSR method using Geopsy software to produce H/V curves with parameters A0 and f0. From these two parameters, the values of soil susceptibility index (Kg) and ground shear strain (γg) are obtained. The results showed that the susceptibility index ranged from 0.26 x 10-6 s2/cm to 16.34 x 10-6 s2/cm and ground shear strain ranged from 1.32 x 10-4 to 2.15 x 10-6. Thus, the highest landslide potential is found at point 6 with the highest susceptibility index of 16.34994479 and ground shear strain of 1.32x10¬4. 
SEISMIK VULNERABILITY INDEX ANALYSIS IN NAGARI MALALAK TIMUR AS AN EFFORT TO DETERMINE LANDSLIDE POTENTIAL AREAS THE HVSR METHOD Silitonga, Yese Angga Marito; Syafriani, Syafriani
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, N
Publisher : Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v7i1.41253

Abstract

Nagari Malalak Timur, Malalak Subdistrict, Agam Regency has experienced landslides caused by soil movement so that the soil conditions become unstable. Landslides are also influenced by external factors such as vibrations from earthquakes and vibrations from human activities. For this reason, a study was conducted to describe the distribution of seismic vulnerability index as an effort to determine the potential landslide area. The sampling was limited to 10 measurement points using a set of seismograph sysmatrack MAE sensor type S3S. The basic principle of HVSR method is to obtain the value of Dominant Frequency (f0) and Amplification Factor (A0) by comparing the value of horizontal component and vertical component of microtremor data. From the value of Dominant Frequency (f0) and Amplification Factor (A0), the calculation of Dominant Period (T0) and Seismic Susceptibility Index (Kg) can be done. The results of research in Nagari Malalak Timur show the value of Dominant Frequency (f0) is in the range of 2.676 - 7.22 Hz. The Amplification Factor (A0) value is in the range of 1.4 - 6.563. The Dominant Period (T0) value is in the range of 0.138 - 0.373 s. The Seismic Susceptibility Index (Kg) value is in the range of 0.365 - 14.62 cm/s2. Based on the distribution of Seismic Susceptibility Index (Kg) values in the 10 research points, the highest landslide potential is in point D with a Seismic Susceptibility Index (Kg) value of 14.62 cm/s2. This causes landslides to occur at any time.Keywords: Amplification Factor, Dominant Frequency, HVSR, Seismic Susceptibility Index
ANALISIS KANDUNGAN ELEKTROLIT DAN NON ELEKTROLIT PADA BUAH-BUAHAN LOKAL MENGGUNAKAN PERALATAN SEDERHANA Jahro, Iis Siti; Sinaga, Steven; Syafriani, Syafriani; Harahap, Dhini Haryati; Az Zahra, Salwa; Damanik, Haryana; Panjaitan, Nola Sari
SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Vol. 5 No. 4 (2025)
Publisher : Pusat Pengembangan Pendidikan dan Penelitian Indonesia (P4I)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51878/science.v5i4.7223

Abstract

Fruits are not only valuable as sources of nutrition but also contain electrolytes that can conduct electric current. The presence of electrolytes in fruits is important to understand since they can be utilized as an alternative, eco-friendly source of electrical energy based on simple principles. This knowledge is also relevant for the advancement of science and technology related to the use of natural materials for energy generation. This study aims to investigate the electrical conductivity of nine local fruits: lemon, Pontianak orange, sweet orange, tomato, kuini, mango, banana, lime, and ambarella. The method involved using a multimeter, copper (Cu) electrodes, and carbon (pencil) electrodes inserted directly into the fruits to measure the voltage produced. The results show that each fruit exhibited different electrical conductivity. Kuini and mango produced the highest average voltage of 0.18 V, while lemon showed the lowest average voltage of 0.04 V. Differences are influenced by water content, ions, and fruit tissue structure. ABSTRAKBuah-buahan tidak hanya bermanfaat sebagai sumber gizi, tetapi juga mengandung elektrolit yang dapat berperan dalam menghantarkan arus listrik. Kandungan elektrolit dalam buah perlu diketahui karena dapat dimanfaatkan sebagai alternatif sumber energi listrik ramah lingkungan dengan prinsip sederhana. Pemahaman ini juga penting dalam pengembangan ilmu pengetahuan dan teknologi yang berhubungan dengan pemanfaatan bahan alami sebagai penghasil energi. Penelitian ini bertujuan untuk mengetahui daya hantar listrik pada sembilan jenis buah-buahan lokal, yaitu jeruk lemon, jeruk pontianak, jeruk manis, tomat, kuini, mangga, pisang, jeruk nipis, dan kedondong. Metode penelitian dilakukan dengan menggunakan multimeter, elektroda tembaga (Cu), dan elektroda karbon (pensil), yang ditancapkan langsung ke dalam buah untuk mengukur tegangan listrik yang dihasilkan. Hasil penelitian menunjukkan bahwa setiap buah memiliki kemampuan hantar listrik yang berbeda-beda. Kuini dan mangga memiliki tegangan rata-rata masing-masing sebesar 0,18 volt, sedangkan jeruk lemon memiliki tegangan rata-rata terendah sebesar 0,04 volt. Perbedaan daya hantar listrik ini dipengaruhi oleh kandungan air, ion, serta struktur jaringan pada buah.
Co-Authors Afiah Afiah Agustina, Mia Dwi Alini, Alini Althaf, Muhammad Mahdy Anggraini Dhilon, Dhini Aprilla, Nia Astuti, Haryati Astuti, Retnaning Az Zahra, Salwa Cahyani, Yuyun Febri Cuyno Mellen, Renie Damanik, Haryana Darma, Wiga Aulia Daya, Ellen Kurniawati Defita, Ermi Dessyka Febria, Dessyka Deswari, Dini Eka Saputri, Eka Elizha, Zellvia Erlinawati Erlinawati, Erlinawati Faizah, Ni’ma Tri Fauzi Ahmad Muda Fauzi, Muhammad Aulia Febriwanti, Mutiara Kusuma Felayati, Felayati Fitri S, Rahmi Pramulia Florentina Simalango, Nora Gunarmi Gunarmi, Gunarmi Hamdi , Hamdi Hamdi Hamdi Handayani, Riska Harahap, Dhini Haryati Hardianti, Evi Harman Amir Husna, Azmi Asmaul Iis Siti Jahro Kusuma, Novy Oktaviandri Letmi Dwiridal Lingga, Leny Julia lsmalinda, lsmalinda Mardhatillah, Dela Mesi, Mesi Miftahurrahmi, Miftahurrahmi Mubasysyir Hasanbasri Nabilla, Agma Navelia, Zesika Intan Nila Kusumawati Ningsih, Andi Pramesti Noorhayati, Ariyana Nur Azizah Nur Faizah, Ida Oktaviani, Yoneta Panjaitan, Nola Sari Parasandy , Ardila Parmin, Joria Percindira, Ella Dwi Purnamasari, Yulia Puteri, Ade Dita Putri, Minazri Eka Putri, Yura Chaniago Ramadhan, Syahwira Ramli Ramli Rejeki, Yunaji Sri Rizki Rahmawati Lestari Rizqi, Eka Roshifita S, Ayu Purnamasari Sahadan, Veva Aisyah Azahra Saibatul Aslamiah, Saibatul Silitonga, Yese Angga Marito Sinaga, Steven Sitanggang, Moren Betty Pera Siwi Padmawati, Retna Sofiana Sofiana, Sofiana SYARIFA SYARIFA, SYARIFA Syukrianti Syahda Taruna, Jhon Tati Herlina Viora, Dwi Wahyu Ramadhan WIJOYO, HADION Yanri Wijayanti Subronto Yendri Sudiar, Nofi Yuliska, Rumi Yusrila, Yoga Zulhendra Zulhendra Zulhendra, Harman Amir